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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
</head>

<body>
    <script>

        // 1. 对象的 keys 和 values
        var obj = {
            name: 'asdasd',
            age: 33,
            address: '武汉市'
        };


        var arr = [3, 4, 5, 6, 7];

        console.log(Object.keys(arr));
        console.log(Object.values(arr));

        // console.log(Object.keys(obj));
        // console.log(Object.values(obj));


    </script>
</body>

</html>